Which of the following about Apache Hadoop Distributed File System $($HDFS$)$ is ALSE

A$.$ It is often used as an implementation of "data lake".

B$.$ The data$/$slave node$($s$)$ keeps track of the locations of data blocks.

C$.$ Data blocks are usually saved in the data$/$slave nodes.

D$.$ Its block size is normally larger than the sizes of typical file systems.